Temperature Compensated Solution Concentration Measurement Based on a Cascaded SMS/LPFG Fiber Structure  

作　　者：Jin Wang Li Wang Xueqiong Su Huanhuan Yan Jin Wang;Li Wang;Xueqiong Su;Huanhuan Yan(College of Physics and Optoelectronics, Faculty of Science, Beijing University of Technology, Beijing, China)

机构地区：[1]College of Physics and Optoelectronics, Faculty of Science, Beijing University of Technology, Beijing, China

出　　处：《Optics and Photonics Journal》2021年第8期294-300,共7页光学与光子学期刊（英文）

摘　　要：<div style="text-align:justify;"> In this paper, a hybrid optical fiber structure for solution concentration measurement with the temperature compensation is proposed. The structure consists of long period fiber grating (LPFG) and single mode-multimode-single mode (SMS) fiber structures. The sensing mechanism of the device is studied and verified by experiments. LPFG is sensitive to solution concentration and is affected by temperature crosstalk. SMS structure is not affected by solution concentration, but sensitive to ambient temperature. It can be used as a temperature compensation system. The sensitivity coefficients of LPFG and SMS on temperature and concentration were measured experimentally, and a dual-wavelength matrix was established to realize simultaneous measurement of solution temperature and concentration. </div><div style="text-align:justify;"> In this paper, a hybrid optical fiber structure for solution concentration measurement with the temperature compensation is proposed. The structure consists of long period fiber grating (LPFG) and single mode-multimode-single mode (SMS) fiber structures. The sensing mechanism of the device is studied and verified by experiments. LPFG is sensitive to solution concentration and is affected by temperature crosstalk. SMS structure is not affected by solution concentration, but sensitive to ambient temperature. It can be used as a temperature compensation system. The sensitivity coefficients of LPFG and SMS on temperature and concentration were measured experimentally, and a dual-wavelength matrix was established to realize simultaneous measurement of solution temperature and concentration. </div>

关 键 词：Long Period Fiber Grating Multimode Mode Fiber Solution Concentration Temperature Dual-Wavelength Matrix 

分 类 号：TN2[电子电信—物理电子学]